MCAS volunteer orientation: Learn how to volunteer at Multnomah County Animal Services during this one-hour session, 7-8 p.m. Friday at the shelter, 1700 W. Columbia River Highway in Troutdale. No need to RSVP; details at multcopets.org.

Kitten Palooza: Up to 100 kittens from Cat Adoption Team will be available at this largest kitten adoption event in the Portland metro area, 10 a.m.-6 p.m. at CAT, 14175 S.W. Galbreath Drive in Sherwood. Kitten adopters will have the chance to "supersize" adoptions by getting an adult cat for free. Adoption fee for kittens: $125, which includes spay/neuter, first vaccines, testing for FIV and feline leukemia, kitten care booklet and sample bag of food. Details: catadoptionteam.org.

Walk on the Wild Side dog walk: Bring your canine companion to this dog walk benefiting WildCat Haven, 11 a.m.-3 p.m. at Stella Olson Memorial Park, 22256 S.W. Washington St. in Sherwood. The event will feature pet-friendly vendors, raffle prizes, a pet photo booth and a "passport" walk through Old Town Sherwood. Participants will also receive a "doggy bag" of treats. Registration: $20 for the first dog and $10 for each additional dog; all proceeds benefit WildCat Haven. Details: wildcathaven.org or call 503-625-0812.

Doggie Olympic Games: Compete in a variety of events ranging from a pet parade, costume and trick contests to agility, ball toss and peanut butter lick competitions at this weekend-long event, beginning with registration at 11 a.m. on the beach at Bolstad Avenue in Long Beach, Wash. Cost: $10 per event or $40 for five or more events; details at doggieolympicgames.com.

KittenFest: The Oregon Cat Project's third annual KittenFest, featuring kittens at half off the adoption fee, will take place from noon to 4 p.m. at The Oregon Cat Project, 342 B Ave. in Lake Oswego. Cost: $60 for the first kittens and $30 for the second, which includes spay/neuter, microchip, first vaccines and 30 days of health insurance. Adoption fees for adult cats will be waived for qualified adopters. More information: theoregoncat.org.

OHS Pet Adoption Day at Whole Foods: Get your dog's nails clipped for free by Pet Samaritan Clinic, listen to live music by My Voice Music and Nick Kent and maybe meet your new best friend at this event, noon-4 p.m. at Whole Foods Market, 2825 E. Burnside St. in Portland. Details: wholefoodsmarket.com.

Puppy romp: Puppies will learn how to play and socialize with other dogs in an appropriate way, and OHS trainers will be on hand to answer any questions about raising puppies at this class, 5-5:45 p.m. in Manners Halls at the Animal Medical and Learning Center at Oregon Humane Society, 1067 N.E. Columbia Blvd. in Portland. Puppies must be five months or younger, current on vaccinations and show no signs of illness. Cost: donation; details at oregonhumane.org.

Summer Solstice Silent Auction: This fundraiser for Born Again Pit Bull Rescue will feature tapas and sangria, flamenco dancing, live entertainment and more, 6-10 p.m. at 14795 S.W. Murray Scholls Drive, #201 in Beaverton. Cost: $20 in advance; $25 at the door. Purchase tickets at bapbr.org.